1) Two trains start simultaneously from Mumbai and Chennai, respectively towards each other on the same track. The distance between the two stations is 560 km and speed of the trains are 30 kmph& 40 kmph. Simultaneously with the trains, a sparrow sitting on the top of one of the train starts towards the other and reverses its direction on reaching the other train and so on. If the speed of the sparrow is 80 kmph then the distance that the sparrow flies before being crushed between the train is.

2) train leaves Rampur at 2:15 pm and travels at the rate of 50 kmph. Another train leaves Rajrupur for Rampur at 1:35 pm and travels at the rate of 60 kmph. If the distance between Rajrupur and Rampur is 590 km at what distance from Rampur will the two trains meet?

3) The speed of the two trains are in the ratio 3:4. They are going in opposite directions along parallel tracks. If each takes 3 seconds to cross a telegraph post, find the time taken by the trains to cross each other completely?

4) 64, 72, 79, 93, 103, ?

5) A man bought a tonga and a horse for Rs 7500. He sold the tonga at 11% profit and the horse at 26% profit, making 19% profit on the whole. Find the cost price of the tonga and the horse separately.

6) If 12 men and 16 boys can do a piece of work in 5 days and 13 men and 24 boys can do it in 4 days, compare the daily work done by a man with that done by a boy.

7) Find the number of ways in which 8 different flowers can be strung to form a garland so that 4 particular flowers are never separated.

8) A dealer bought a horse at 20% discount on its original price. He sold it at a 40% increase on the original price. What percentage of profit did he get?

9) Ram purchased a radio set for Rs 300 and sold it to Shyam at a profit of 25%. Shyam sold it to Mohan at a loss of 10%. For how much did Mohan buy it?

10) 3, 15, 35, 63, ?, 143